EML files are a local file representation of an email as it is transferred around the internet, so they contain the email attachments and all. My understanding of of windows live mail is it uses EML files, that is what you import to Thunderbird. So attachments will appear as they did before.

Thanks Matt - most helpful. It's actually the older version I have on the old PC - just "Windows Mail". I have created a test file of e-mails to transfer, and they are indeed .EML. Pushed for time today, but I'll do a test transfer tomorrow, and hopefully sort out the full migration.

Once again, "Thanks".

John